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King's Gambit: Accepted, King's Knight Gambit

Fedorov–Ivanchuk, Corus Wijk aan Zee 2001 · Nakamura–Adams, London Chess Classic 2011 · 6:08 · ECO C34

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In this video

Game 1: Alexei Fedorov (2575) vs Vassily Ivanchuk (2717)

Corus Wijk aan Zee 2001, 20 January 2001 · Black won (0-1) · 34 moves

Click a move to jump the video to it. Dotted moves are the opening line the video is about.

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Key moments

  1. 3...g5The first move after the opening line0:22
  2. 26.Rf5Black stays more than two pawns ahead from here1:59
  3. 27.Kc2The evaluation moves from −2.03 to −4.842:04
  4. 30.Rxe3The evaluation moves from −5.91 to −8.332:19
  5. 33...Qf6+The evaluation moves from −4.76 to −8.552:36
  6. 34...Qb6+Black wins after 34 moves2:42

Evaluation

Above the line, White is better; below it, Black. Scores are in pawns, capped at five either way.

Game 2: Hikaru Nakamura (2758) vs Michael Adams (2734)

London Chess Classic 2011, 12 December 2011 · White won (1-0) · 41 moves

Click a move to jump the video to it. Dotted moves are the opening line the video is about.

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Key moments

  1. 3...d5The first move after the opening line3:02
  2. 33.Kg1The evaluation moves from −0.07 to −1.515:15
  3. 35...Bc5+The evaluation moves from −1.90 to −0.115:28
  4. 41.c7The evaluation moves from +1.55 to +6.22, and White stays more than two pawns ahead from here5:55
  5. 41.c7White wins after 41 moves5:55

Evaluation

Above the line, White is better; below it, Black. Scores are in pawns, capped at five either way.

About these games

After 1.e4 e5 2.f4 exf4, White has given up the f-pawn to open the f-file and build a big centre with a later d4. With 3.Nf3, White develops and stops the queen check on h4. Black can try to keep the extra pawn with ...g5 or return it at once with ...d5 to free the pieces.

Fedorov–Ivanchuk followed the Kieseritzky, 3...g5 4.h4 g4 5.Ne5. Black kept the pawn on f4 for a while, then gave material back in the centre with 8...Nxe4 and 9...d5, and castled while White's king stayed in the middle. After 15...Bg3+ 16.Kd1, the white king had nowhere safe to go. The engine favoured Black throughout, and 27.Kc2 took the score from −2.03 to −4.84. The e- and d-pawns then broke through with 29...e3+ and 31...d2. After 34...Qb6+, Black won.

Nakamura–Adams went 3...d5 4.exd5 Nf6, with Black returning the pawn for quick development. White castled early and played 11.b3 and 13.Bxc6 to break up Black's queenside pawns. Black kept an edge of about −1.50 for most of the game, but 30...f3 cut it from −2.69 to −0.42, and 35...Bc5+ brought it to −0.11. Unlike Game 1, this game was decided by pawns, not by a king hunt. White's passed pawns on c6 and d5 won the game: 41.c7 took the score from +1.55 to +6.22, and White won.

Chapters

  1. 0:00Introduction and the opening line
  2. 0:10Game 1: Fedorov vs Ivanchuk, Corus Wijk aan Zee 2001
  3. 2:50Game 2: Nakamura vs Adams, London Chess Classic 2011

The opening line

1. e4 e5 2. f4 exf4 3. Nf3

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